http://llvm.org/bugs/show_bug.cgi?id=6936
Summary: clang -E -P -C -include doesn't work
Product: clang
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Blocks: 4068
Command-line:
clang -E -MD -MF arch/x86/kernel/acpi/realmode/.wakeup.lds.d -nostdinc
-isystem /usr/local/bin/../lib/clang/1.0/include
-I/home/edwin/builds/linux-2.6/arch/x86/include -Iinclude -include
include/generated/autoconf.h -D__KERNEL__ -P -C -P -C -Ux86_64 -D__ASSEMBLY__
-DLINKER_SCRIPT -o arch/x86/kernel/acpi/realmode/wakeup.lds
arch/x86/kernel/acpi/realmode/wakeup.lds.S
Output:
/*
* Automatically generated C config: don't edit
* Linux kernel version: 2.6.34-rc5
* Sun Apr 25 12:54:09 2010
*/# 1 "<built-in>" 2
Which makes ld reject the linker script (# 1 is outside comment).
Small testcase:
$ touch empty.S
$ cat >foo.h <<EOF
/*
* Automatically generated C config: don't edit
* Linux kernel version: 2.6.34-rc5
* Sun Apr 25 12:54:09 2010
*/
EOF
$ clang -E -P -C -include foo.h empty.S
/*
* Automatically generated C config: don't edit
* Linux kernel version: 2.6.34-rc5
* Sun Apr 25 12:54:09 2010
*/# 1 "<built-in>" 2
$ gcc -E -P -C -include foo.h empty.S
/*
* Automatically generated C config: don't edit
* Linux kernel version: 2.6.34-rc5
* Sun Apr 25 12:54:09 2010
*/
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